Fix for new effects that have suspendBackgroundProcessing set to true. This flag would previously disable layout validation, which effectively prevents Flex 4 effects from working at all, because they set the public x/y/width/height/etc. properties and depend on layout validation doing its job to move/resize targets appropriately. This fix disables that portion of suspendBGProcessing so that layout happens normally, specifically for Flex 4 apps (compatibility-version=3 works as before).